<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button>取消定时器</button>
    <script>
        var time = window.setTimeout(function(){
            console.log('定时器方法被调用');
        },5000)

        var btn = document.querySelector('button');
        btn.addEventListener('click',function(){
            console.log('点击按钮取消定时器');
            window.clearTimeout(time)
        })
    </script>
</body>
</html>